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Relief Valves

Industrial Duty Relief Valves for Reliable Pressure Relief
Relief/Pop-Off Valves

Relief valves can be used as primary pressure control devices or secondary (safety) pressure relief devices. Many systems also use two relief valves, one set as the primary pressure control and the other set as a secondary relief.

When used as a primary pressure control device, the relief valve sets and maintains consistent system pressure. Excess flow is bypassed back to the pump inlet, tank, or drain when the system reaches the set pressure point.

When configured as a secondary pressure control device, the relief valve provides pressure relief if the primary pressure control valve malfunctions. The secondary relief valve will open to relieve the system pressure, protecting the pump and system from damage caused by over-pressurization. A secondary relief valve can save costly pump and system damage, and more importantly, it’s an added safety feature to protect those working around the equipment.

Product Range:
0 to 320 GPM, 0 to 10,000 PSI

Typical Usage:
Used for single pump, multiple pumps, nozzle, and gun applications.

Materials:
Available in brass, 304, and 316 stainless steel

Elastomers:
Medium nitrile buna (NBR), fluorocarbon (FPM), ethylene propylene diene monomer (EPDM), and more.

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Materials:

Pumps and Accessories Catalog
Brass
Model Min Flow Max Flow Min Pressure Max Pressure Inlet/Discharge Ports Bypass Ports
7190 0.00 GPM / 0.00 LPM 6.50 GPM / 25.00 LPM 400 PSI / 28 BAR 5000 PSI / 345 BAR 3/8" BSP(F) / 3/8" BSP(F) 3/8" BSP(F)
7693.100 0.00 GPM / 0.00 LPM 10.50 GPM / 40.00 LPM 230 PSI / 16 BAR 2300 PSI / 158 BAR 3/8" NPT(F) / 3/8" NPT(F) 3/8" NPT(F)
7694.100 0.00 GPM / 0.00 LPM 10.50 GPM / 40.00 LPM 400 PSI / 28 BAR 4050 PSI / 280 BAR 3/8" NPT(F) / 3/8" NPT(F) 3/8" NPT(F)
7630.100 0.00 GPM / 0.00 LPM 10.50 GPM / 40.00 LPM 400 PSI / 28 BAR 5100 PSI / 350 BAR 3/8" NPT(M) / 3/8" BSP(F) 1/2" NPT(F)
997304 0.00 GPM / 0.00 LPM 20.00 GPM / 75.70 LPM 0 PSI / 0 BAR 300 PSI / 20 BAR 1/2" NPT(M) / 1/2" NPT(F) 1/2" NPT(F)
7537.100 0.00 GPM / 0.00 LPM 21.00 GPM / 80.00 LPM 230 PSI / 16 BAR 2600 PSI / 179 BAR 1/2" NPT(F) / 1/2" NPT(F) 1/2" NPT(F)
7542.100 0.00 GPM / 0.00 LPM 21.00 GPM / 80.00 LPM 800 PSI / 55 BAR 4000 PSI / 275 BAR 1/2" NPT(F) / 1/2" NPT(F) 1/2" NPT(F)
7196 0.00 GPM / 0.00 LPM 21.00 GPM / 80.00 LPM 100 PSI / 7 BAR 7250 PSI / 500 BAR 1/2" BSP(F) / 3/8" BSP(F) 3/8" BSP(F)
7590.100 0.00 GPM / 0.00 LPM 52.00 GPM / 200.00 LPM 400 PSI / 28 BAR 2175 PSI / 150 BAR 1" NPT(F) / 1" NPT(F) 1" NPT(F)
7595 1.00 GPM / 3.80 LPM 53.00 GPM / 200.00 LPM 260 PSI / 18 BAR 2600 PSI / 180 BAR 3/4" NPT(F) / 1/2" NPT(F) 1/2" NPT(F)
316 Stainless Steel
Model Min Flow Max Flow Min Pressure Max Pressure Inlet/Discharge Ports Bypass Ports
7034 0.00 GPM / 0.00 LPM 21.00 GPM / 80.00 LPM 400 PSI / 28 BAR 2200 PSI / 155 BAR 1/2" NPT(F) / 1/2" NPT(F) 1/2" NPT(F)
7036 0.00 GPM / 0.00 LPM 21.00 GPM / 80.00 LPM 800 PSI / 55 BAR 4000 PSI / 275 BAR 1/2" NPT(F) / 1/2" NPT(F) 1/2" NPT(F)
7037 0.00 GPM / 0.00 LPM 21.00 GPM / 80.00 LPM 3000 PSI / 207 BAR 5700 PSI / 400 BAR 1/2" NPT(F) / 1/2" NPT(F) 1/2" NPT(F)
890718 10.00 GPM / 38.00 LPM 50.00 GPM / 189.00 LPM 1000 PSI / 69 BAR 8000 PSI / 550 BAR 2" NPT(M) / 2" NPT(F) 2" NPT(F)
890709 20.00 GPM / 76.00 LPM 60.00 GPM / 227.00 LPM 1500 PSI / 103 BAR 4000 PSI / 275 BAR 2" NPT(F) / 2" NPT(F) 2" NPT(M)
890731 15.00 GPM / 56.00 LPM 75.00 GPM / 284.00 LPM 100 PSI / 7 BAR 400 PSI / 28 BAR 2" NPT(F) / 2" NPT(F) 2" NPT(M)
890715 0.00 GPM / 0.00 LPM 100.00 GPM / 378.00 LPM 1000 PSI / 69 BAR 8000 PSI / 550 BAR 2" NPT(M) / 2" NPT(F) 2" NPT(F)
890700 30.00 GPM / 114.00 LPM 180.00 GPM / 680.00 LPM 1000 PSI / 70 BAR 3000 PSI / 207 BAR 2" NPT(F) / 2" NPT(F) 2" NPT(M)
890702 25.00 GPM / 95.00 LPM 210.00 GPM / 795.00 LPM 500 PSI / 35 BAR 2000 PSI / 138 BAR 2" NPT(F) / 2" NPT(F) 2" NPT(M)
890713 0.00 GPM / 0.00 LPM 210.00 GPM / 795.00 LPM 800 PSI / 55 BAR 4000 PSI / 27 BAR 2" NPT(M) / 2" NPT(F) 2" NPT(F)
890706 15.00 GPM / 57.00 LPM 260.00 GPM / 984.00 LPM 250 PSI / 17 BAR 1000 PSI / 69 BAR 2" NPT(F) / 2" NPT(F) 2" NPT(M)
890704 45.00 GPM / 170.00 LPM 320.00 GPM / 1211.00 LPM 500 PSI / 35 BAR 2000 PSI / 138 BAR 2" NPT(F) / 2" NPT(F) 2" NPT(M)
304 Stainless Steel
Model Min Flow Max Flow Min Pressure Max Pressure Inlet/Discharge Ports Bypass Ports
7531.100 0.00 GPM / 0.00 LPM 21.00 GPM / 80.00 LPM 400 PSI / 28 BAR 2200 PSI / 155 BAR 1/2" NPT(F) / 1/2" NPT(F) 1/2" NPT(F)
7533.100 0.00 GPM / 0.00 LPM 21.00 GPM / 80.00 LPM 800 PSI / 55 BAR 4000 PSI / 275 BAR 1/2" NPT(F) / 1/2" NPT(F) 1/2" NPT(F)
7536.100 0.00 GPM / 0.00 LPM 21.00 GPM / 80.00 LPM 3000 PSI / 207 BAR 6000 PSI / 414 BAR 1/2" NPT(F) / 1/2" NPT(F) 1/2" NPT(F)